If + means × and - means ÷ and × means + and ÷ means - find 6÷8-2+5×20=​

What situation is an example of an observational study

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?